Milling device for working, and in particular for trimming the edges of sheet metal strips, sheet metal plates or the like

Abstract

A milling device for working, and particularly for trimming the edges, of sheet metal strips, sheet metal plates, and the like. The workpiece is movable in any desired shape or direction in relation to the working position between guide rollers. The milling device has a cutter head which can be turned by a motor. The rotational axis of the cutter head is located approximately parallel to the plane of the workpiece and approximately vertical to the direction of advancement of the device. The device is provided with at least one cutter element provided with a cutting edge inclined at an angle to the normal plane of the cutter head.

What is claimed is: 
     
       1. A milling device for working and trimming the edges of sheet metal, said milling device being movable in any desired shape or direction relative to the working position between guide rollers, said device comprising: a cutter head turnable by a motor;   said cutter head having a rotational axis, the rotational axis of said cutter head located approximately parallel to the plane of the workpiece and approximately vertical to the direction of advancement of the device;   the device having at least one cutting element which is provided with a convex arcuate cutting edge and disposed on the front of the cutter head wherein the face of the cutter element has a particular radius, and the center of the cutting edge face is located less than the distance of the particular radius from the rotational axis;   the cutting edge face forming an angle α with a plane which is perpendicular to the rotational axis of the cutter head, said angle α being viewed parallel to the direction of travel of the edge of the sheet metal;   said cutting edge face also forming an angle β with said plane which is perpendicular to the rotational axis of the cutter head, said angle β being viewed perpendicularly to the direction of travel of the edge of the sheet metal from above;   the rotating cutting edge having a contact point located close to the rotational axis and a contact point located at a greater radial distance, thereby creating a relatively long cutting edge segment for the creation of a drawing cut along the cutting edge segment and for working the workpiece along a large contact arc φ.   
     
     
       2. A device in accordance with claim 1 wherein the cutter head has on a front end thereof at least one attachment surface for the cutting element, said surface being parallel to the cutting face. 
     
     
       3. A device in accordance with claim 1 wherein said convexly curved cutting edge of the cutting element is formed by a cutting edge having a plurality of cutting segments which are determined by an entry point and an exit point. 
     
     
       4. A device in accordance with claim 3 wherein all cutting segments of the cutting element have an identical shape. 
     
     
       5. A device in accordance with claim 4 wherein the cutting segments of the cutting element are in the form of a circle. 
     
     
       6. A cutting device in accordance with claim 4 wherein the cutting segments of the cutting element are in approximately the form of a circle.